Effective Field Theories and Cosmological Scattering Equations

Abstract

We propose worldsheet formulae for wavefunction coefficients of the massive non-linear sigma model (NLSM), scalar Dirac-Born-Infeld (DBI), and special Galileon (sGal) theories in de Sitter momentum space in terms of the recently proposed cosmological scattering equations constructed from conformal generators in the future boundary. The four-point integrands are assembled from simple building blocks and we identify a double copy prescription mapping the NLSM wavefunction coefficient to the DBI and sGal wavefunction coefficients, including mass deformations and curvature corrections. Finally, we compute the soft limits of these wavefunction coefficients and find that they can be written in terms of boundary conformal generators acting on contact diagrams.

v2. minor changes, published in JHEP

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Cited by in corpus (11)

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• Cosmological Correlators Through the Looking Glass: Reality, Parity, and Factorisation
• New recursions for tree-level correlators in (Anti) de Sitter space
• On Graviton non-Gaussianities in the Effective Field Theory of Inflation
• Enhanced Soft Limits in de Sitter Space
• Flat-space structure of gluon and graviton in AdS
• Bootstrapping Witten diagrams via differential representation in Mellin space
• Flavour-kinematics duality for Goldstone modes
• Soft Limits of Gluon and Graviton Correlators in Anti-de Sitter Space
• A Novel On-Shell Recursive Relation